SFLan(http://www.archive.org/web/sflan.php)
is an experimental community wireless project in San Francisco.
The goal is to build a network with LAN characteristics (openness, ownership,
speed, price) on a metropolitan scale.

OpenHotSpot - OHS(http://www.openhotspots.net/)
is a global database of publically available Wireless LAN HotSpots.
Join now and add your HotSpot to the database so that other users may surf it!
OHS features a WavePoint system.

Linux Applications

Wifimap(http://savannah.nongnu.org/projects/wifimap/)
is an Web-based application that graphically documents the
organisation and growth of a wireless network community. The map is
composed of numerous square cells that are recombined to display the
required area. Users can start with just a few cells to cover their area,
and can access different areas of the network by scrolling through the
cells.

phpKisMapper(http://www.no1atall.com/dev/phpkismapper/)
is a PHP class which processes Kismet logfiles to
create a map of wireless networks. Using the built-in XML parser and the
GD library, the class reads GPS co-ordinates on wireless access points,
downloads a map from the Web, and outputs the map with the recorded
wireless APs.

From the Publisher:
"Building Wireless Community Networks
is about getting people online using wireless network technology. The 802.11b standard (also known as WiFi) makes it possible to network towns, schools, neighborhoods, small business, and almost any kind of organization. All that's required is a willingness to cooperate and share resources. The first edition of this book helped thousands of people engage in community networking activities. This revised and expanded edition adds coverage on new network monitoring tools and techniques, regulations affecting wireless deployment, and IP network administration, including DNS and IP Tunneling.